منابع مشابه
Lessons Learned from Crime Caught on Camera
Objectives The widespread use of camera surveillance in public places offers criminologists the opportunity to systematically and unobtrusively observe crime, their main subject matter. The purpose of this essay is to inform the reader of current developments in research on crimes caught on camera. Methods We address the importance of direct observation of behavior and review criminological s...
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Recent results have provided graphic support for the hypothesis that vesicle secretion involves a 'kiss-and-run' mechanism. Evanescent field microscopy has shown that, during exocytosis, intravesicular markers escape without collapse of the vesicular membrane into the surface membrane and that the empty vesicle is immediately retrieved back into the cell.
متن کاملCaught in the act
Along with replication and mutability, living beings are set apart from the mineral background they inhabit by their metabolism—their ability to catalyse chemical reactions. Since Linus Pauling first proposed that these reactions are made pos sible by enzymes that recognize and bind tightly to their substrates at a crucial transi tion point [1], it has become increasingly clear that understan...
متن کاملCaught Between Two Principals
Mutual fund providers serve two principals with opposing interests: their owners, who want them to maximize profits, and their fund shareholders, who want them to maximize fund returns. I investigate what role is played by customer power and information, as well as by competition among fund providers in influencing the balance of power between these two opposing principals. Using a data set of ...
متن کاملSynthetic Biology: Caught
Novel artificial genetic systems with twelve bases instead of four. 1 Bacteria that can be programmed to take photographs 2 or form visible patterns. 3 Cells that can count the number of times they divide. 4 A live polio virus " created from scratch using mail-order segments of DNA and a viral genome map that is freely available on the Internet. " 5 These are some of the remarkable, and occasio...
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ژورنال
عنوان ژورنال: Nature
سال: 2002
ISSN: 0028-0836,1476-4687
DOI: 10.1038/418721a